Exercise step



FIG. 1 is a perspective view of an exercise step, showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view of a second modified embodiment thereof;

FIG. 9 is a right side elevational view thereof;

FIG. 10 is a left side elevational view thereof;

FIG. 11 is a front elevational view thereof;

FIG. 12 is a top plan view thereof;

FIG. 13 is a rear elevational view thereof;

FIG. 14 is a bottom plan view thereof;

FIG. 15 is a perspective view of a third modified embodiment thereof;

FIG. 16 is a right side elevational view thereof;

FIG. 17 is a left side elevational view thereof;

FIG. 18 is a front elevational view thereof;

FIG. 19 is a top plan view thereof;

FIG. 20 is a rear elevational view thereof; and,

FIG. 21 is a bottom plan view thereof.

The ornamental design for an exercise step, as shown.